In Death’s Grasp, Part 1 by Alyssa B. Cole

She’s about to go from haunted to hunted…
A traumatic incident in Primrose’s childhood has left her with a stutter and, more recently, paranoia. Nevertheless, she tries to live a quiet, peaceful life with her sister and brother-in-law. But when she nearly drowns, she wonders if her fears really are all in her head.
It’s a relief to meet Amadeon, a handsome and stoic man who says he understands her grief. Despite the warnings of her best friend, he quickly becomes a part of Primrose’s life. However, odd things keep happening as her friendship with him deepens.
With her grip on reality slipping, can Primrose find the truth before it’s too late?